Construction equipment and construction method for underwater rock pile construction

Abstract

The application provides a construction equipment and a construction method for underwater rubble pile construction, and relates to the technical field of underwater rubble pile construction equipment.The underwater rubble pile construction equipment comprises an axial lifting vibrator body, the vibrator body comprises a central driving rod, the vibrator body further comprises a sleeve coaxially sleeved outside the central driving rod, the sleeve is a sandwiched double-layer concentric structure with two concentrically and spaced layer cylinder walls integrally formed, and has an open lower end, the bottom height of the inner layer of the sleeve is higher than that of the outer layer, and a step structure is formed.The construction equipment and the construction method for underwater rubble pile construction are characterized in that the sleeve and the vibrator are synchronously lowered and positioned as a whole in the construction stage, the filling operation is performed in the sleeve closed cavity after sealing is completed, the external water flow is isolated from the rubble, the problems of the drift and dispersion of the external feeding stone and the poor pile quality are solved, the narrow central feeding channel is abandoned, and the defect that the traditional central feeding is easy to be blocked is avoided.

Description

Technical Field

[0001] This invention relates to the field of underwater crushed stone pile construction equipment technology, specifically to construction equipment and methods for underwater crushed stone pile construction. Background Technology

[0002] Crushed stone piles are a common method for reinforcing soft soil foundations. They rely on loose stones to compact the soil and consolidate it through drainage, effectively improving the bearing capacity of the foundation. They are widely used in soft soil foundation projects both on land and underwater. Underwater crushed stone pile construction is affected by the aquatic environment, making it far more difficult than on land construction.

[0003] Existing underwater crushed stone pile construction methods include two types: internal feeding and external feeding. When external feeding is performed, the crushed stone is easily eroded and disturbed by the water flow during its fall in the water, causing the stone to disperse and drift. This not only results in a large amount of material loss but also easily leads to defects such as uneven filling of the pile body and mud inclusion, making it difficult to control the quality of the pile. Although the conventional central feeding mode can avoid the direct impact of water flow on the stone, the traditional central channel structure is narrow, and the crushed stone is prone to bridging and blockage, resulting in insufficient reliability of continuous feeding. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides construction equipment and methods for underwater crushed stone pile construction, solving the problem that underwater crushed stone piles are easily affected by interference during material feeding, thus hindering their formation.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: an underwater crushed stone pile construction device, comprising an axially liftable vibratory compactor body, the vibratory compactor body comprising a central drive rod, and the vibratory compactor body further comprising a sleeve coaxially sleeved on the outside of the central drive rod; The sleeve is a sandwich-type double-layer concentric structure with inner and outer cylinder walls arranged concentrically and integrally formed, and the lower end is open. The bottom of the inner layer of the sleeve is higher than the bottom of the outer layer, forming a stepped structure. The lower end of the central drive rod is hinged to a multi-lobe vibrating head via a folding hinge assembly, and both are covered with a flexible protective layer. The lower end opening of the sleeve is equipped with a sandbag seal; In the initial state, the folding hinge assembly supports the flexible protective layer and keeps it in an open state. The flexible protective layer supports the sandbag seal and, together with the weight of the sandbag seal, forms a sealed contact between the two. When the folding hinge assembly is subjected to pressure and squeezes the sleeve, the flexible protective layer retracts inward with the folding hinge assembly, causing the flexible protective layer and the sandbag seal to disengage.

[0006] Preferably, when the sleeve is filled with crushed stone filler, the filler compresses the multi-lobed vibrating head to open adaptively, thereby expanding the vibration compaction range.

[0007] Preferably, the multi-lobed vibrating head includes a central vibrating element and several lobe vibrating elements; The central vibrating element and the petal-shaped vibrating element are hinged together by a first connecting member, and the petal-shaped vibrating element can slide along the surface of the first connecting member.

[0008] Preferably, the multi-lobed vibrating head is slidably mounted inside the central drive rod, and a spring is provided between the central drive rod and the multi-lobed vibrating head.

[0009] Preferably, the flexible protective layer has a plurality of support members inside. The support members are normally semi-circular to support the formation of the flexible protective layer. When the support members are squeezed by external force, they can deform and reduce their outer diameter.

[0010] Preferably, the lower end of the flexible protective layer is provided with an opening, which allows the flap-type vibrating element to protrude and can cooperate to achieve overall sealing.

[0011] Preferably, the folding hinge assembly includes a positioning ring, and the positioning ring is circumferentially hinged with a plurality of second connectors, the lower ends of the second connectors being correspondingly hinged to the upper ends of the first connectors.

[0012] Preferably, the first connector and the second connector form a foldable V-shaped hinge structure.

[0013] Preferably, the sandbag seal comprises a fabric sandbag and sand filling material inside the fabric sandbag, which is formed by its own weight.

[0014] A construction method for underwater crushed stone pile construction equipment is also provided, including the following steps: S1. Lower the sleeve to support it on the underwater mud surface, place the sandbag seal at the lower opening of the sleeve, and lower the assembled vibratory compactor body into the sleeve so that the flexible protective layer and the sandbag seal come into contact and seal. S2. Start the vibratory compactor body and feed downwards to complete the soil hole creation; S3. Add crushed stone filler into the sleeve. The crushed stone compresses the multi-lobed vibrating head to open adaptively and vibrate to compact the pile filler. S4. Lift the vibratory impactor body upwards, the sleeve squeezes and folds the hinge assembly, the multi-lobed vibrating head shrinks in diameter, and at the same time releases the limit on the sandbag seal, the sandbag seal falls off, and the gravel falls into the hole to complete the filling. S5. Continuously lift the vibratory compactor body, remove the vibratory compactor body, and finally pull out the sleeve to complete the construction of a single crushed stone pile.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The construction equipment and method for underwater crushed stone pile construction utilizes a concentric sleeve structure. During the drilling process, the outer sleeve descends synchronously, providing lateral support to the borehole wall and effectively preventing borehole wall collapse and silt intrusion into the work area. The bottom of the inner sleeve is higher than the outer sleeve, forming a stepped structure. When the sleeve is pulled out, the crushed stone inside the sleeve can gather and slide towards the center along the steps, promoting uniform distribution and compaction of the stone, and improving the problems of insufficient material and uneven density at the edge of the pile.

[0016] 2. The construction equipment and method for underwater crushed stone pile construction utilize a multi-lobed vibratory head combined with a V-shaped folding hinge assembly, a sliding fit structure, and a spring pre-tightening structure. When the filler inside the sleeve accumulates and generates lateral pressure, it can drive the multi-lobed vibratory head to adaptively open outward, automatically expanding the vibration compaction range without the need for additional power to expand the diameter. When the vibratory compactor is lifted upward, the hinge structure folds to achieve the retraction and reduction of the vibratory head's diameter, reducing lifting resistance and avoiding disturbance to the pile body.

[0017] 3. The construction equipment and method for underwater crushed stone pile construction involves the synchronous lowering and positioning of the sleeve and vibratory compactor during the construction phase. After sealing, the filling operation is carried out in the sealed cavity of the sleeve to isolate the crushed stone from external water flow. This solves the problems of drifting and dispersion of the stones fed from the outside and poor pile quality. At the same time, it eliminates the narrow central feeding channel and avoids the defects of traditional central feeding that are prone to clogging.

[0018] 4. The construction equipment and method for underwater crushed stone pile construction use a semi-circular ring-shaped support inside the flexible protective layer to maintain the stability of the protective layer's shape. The support can self-adapt to shrinkage under pressure. The petal-shaped vibrating element always runs through and fits the lower opening of the flexible protective layer, forming a dynamic seal throughout the process, preventing mud, sand, and gravel from entering the hinge and sliding gaps, and preventing the mechanism from jamming and failing.

[0019] 5. The construction equipment and method for underwater crushed stone pile construction use sandbag sealing elements for bottom sealing, which are assembled at the lower end of the sleeve and rely on the flexible protective layer to resist and limit the seal; when the vibratory compactor body is lifted, the flexible protective layer moves upward and automatically releases the constraint of the sandbag sealing elements, and the sandbag falls off by its own weight. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the cross-sectional structure of the sleeve of the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of the central drive rod of the present invention; Figure 4 This is a schematic diagram of the flexible protective layer structure of the present invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the flexible protective layer of the present invention; Figure 6This is a schematic diagram of the central vibration component structure of the present invention; Figure 7 This is a schematic diagram of the positioning ring structure of the present invention.

[0021] The components include: 1. Vibratory impactor body; 2. Central drive rod; 3. Sleeve; 4. Folding hinge assembly; 5. Multi-lobed vibratory head; 6. Flexible protective layer; 7. Sandbag seal; 8. Central vibratory component; 9. Lobe vibratory component; 10. First connecting component; 11. Support component; 12. Positioning ring; and 13. Second connecting component. Detailed Implementation

[0022] like Figure 1-7 As shown, an underwater crushed stone pile construction device includes an axially liftable vibratory compactor body 1, which includes a central drive rod 2 and a sleeve 3 coaxially sleeved on the outside of the central drive rod 2.

[0023] The sleeve 3 is a sandwich-type double-layer concentric structure with inner and outer cylinder walls arranged concentrically and integrally formed, and the lower end is open. The double-layer structure can improve the overall structural rigidity of the sleeve 3, and has a stronger ability to resist water flow impact and soil extrusion deformation during underwater operations, effectively preventing the sleeve 3 from tilting. The lower end of the sleeve 3 is provided with an opening for the crushed stone filling material to be lowered.

[0024] The lower end of the central drive rod 2 is hinged to the multi-lobed vibrating head 5 via the folding hinge assembly 4. Both are covered with a flexible protective layer 6. The flexible protective layer 6 can block gravel and sand from entering the hinge gap of the folding hinge assembly 4, prevent sand and gravel from getting stuck at the hinge position, and ensure the smooth opening and closing of the mechanism. On the other hand, it can deform synchronously with the multi-lobed vibrating head 5, and form a sealing barrier with the sandbag seal 7 at the lower end to reduce the inflow of external water into the sleeve 3.

[0025] A sandbag seal 7 is installed at the lower opening of the sleeve 3, and the lower end of the sandbag seal 7 abuts and seals against the flexible protective layer 6.

[0026] In the early stage of construction, the flexible protective layer 6 is used to press the sandbag sealing element 7 to seal the lower opening of the sleeve 3, so that the inside of the sleeve 3 forms a relatively independent space to isolate the external water body. When filling the sleeve 3 with crushed stone later, the water flow is prevented from continuously washing away the crushed stone, thus solving the defects of traditional external feeding of stone material being disturbed and dispersed by water flow and uneven filling.

[0027] During the vibratory drilling and filling compaction stages, the multi-lobed vibratory head 5 is in an outward-expanding state, the flexible protective layer 6 continuously presses the sandbag seal 7 to maintain the sealing state at the bottom of the sleeve 3, and the crushed stone filler is directly put into the inside of the sleeve 3. The filler squeezes the multi-lobed vibratory head 5, further expanding outward, increasing the vibration compaction range, fully vibrating the surrounding soil, and improving the density of the pile.

[0028] In the initial state, the folding hinge assembly 4 supports the flexible protective layer 6 and keeps it in an open state. The flexible protective layer 6 supports the sandbag seal 7 and, together with the weight of the sandbag seal 7, forms a sealed contact between the two. When the folding hinge assembly 4 is subjected to pressure on the sleeve 3, the flexible protective layer 6 retracts inward with the folding hinge assembly 4, causing the flexible protective layer 6 and the sandbag seal 7 to disengage.

[0029] When the filling compaction process is completed, the vibratory compactor body 1 is lifted upwards, and the sleeve 3 is relatively fixed in position. The inner wall of the sleeve 3 will exert a lateral squeezing force on the folding hinge assembly 4. Under the squeezing force, the folding hinge assembly 4 will fold, causing the multi-lobed vibrating head 5 to retract inwards and reduce the overall outer diameter, making it easier for the entire vibration structure to be pulled upwards from inside the sleeve 3.

[0030] As the multi-lobed vibrating head 5 retracts and moves upward, the flexible protective layer 6 moves upward simultaneously, releasing the continuous pressure and limiting the sandbag seal 7. The sandbag seal 7 loses its support and constraint and automatically falls off, allowing the gravel accumulated inside the sleeve 3 to fall smoothly into the pre-drilled pile hole, completing the automatic material discharge.

[0031] When the sleeve 3 is filled with crushed stone filler, the filler squeezes the multi-lobed vibrating head 5 to open adaptively, expanding the vibration compaction range.

[0032] During the filling of the sleeve 3 with crushed stone, the accumulated crushed stone exerts a lateral compressive force on the multi-lobed vibratory head 5, causing it to adaptively open outwards, thereby expanding the vibration compaction range. As the filling material is continuously added and the amount of crushed stone increases, the lateral compressive force increases simultaneously, and the opening amplitude of the multi-lobed vibratory head 5 increases accordingly. This allows for real-time adjustment of the effective vibration radius based on the amount of filling material, adapting to the compaction requirements of different pile diameters. Unlike traditional fixed-diameter vibratory compactors, this structure relies on the compressive force of the crushed stone itself to achieve diameter expansion vibration, fully compacting the soil around the pile body, effectively improving the problem of uneven pile density, and fully utilizing the compressive effect of the filling material. No additional power is needed to drive the vibratory head expansion, simplifying the equipment structure.

[0033] The multi-lobed vibrating head 5 includes a central vibrating element 8 and several lobe vibrating elements 9. The central vibrating element 8 serves as the main vibration source, and each lobe vibrating element 9 is a movable, expandable vibration unit. The central vibrating element 8 and the lobe vibrating elements 9 are hinged together by a first connecting member 10. The lobe vibrating elements 9 can slide along the surface of the first connecting member 10, allowing them to rotate and open relative to the central vibrating element 8. Simultaneously, the lobe vibrating elements 9 can slide axially along the surface of the first connecting member 10, forming a composite motion structure of hinged rotation + axial sliding. This sliding fit structure can effectively compensate for displacement deviations during the opening and closing process of the lobe vibrating elements 9, prevent structural jamming, and improve the smoothness of adaptive deformation.

[0034] The multi-lobed vibrating head 5 is slidably mounted inside the central drive rod 2 and can slide slightly along the axial direction of the central drive rod 2. A spring is provided between the central drive rod 2 and the multi-lobed vibrating head 5.

[0035] Under normal conditions, the spring provides pre-tight support to the multi-lobed vibrating head 5 with its own elastic force, so that the lobed vibrating element 9 always maintains the initial outward opening posture, ensuring the stability of the initial vibration range during construction. When the crushed stone filling in the sleeve 3 squeezes the lobed vibrating element 9 to expand outward, or when the upper lifting equipment causes the structure to shrink in diameter, the compressible spring of the multi-lobed vibrating head 5 adaptively slides to make way, cooperating with the overall structure to complete the opening and closing actions.

[0036] The flexible protective layer 6 has several support members 11 inside. The support members 11 are normally in a semi-circular ring shape to support the formation of the flexible protective layer 6. They can form a continuous skeleton support for the flexible protective layer 6, so that the flexible protective layer 6 maintains a rounded and unfolded shape as a whole. This prevents the flexible protective layer 6 from collapsing, wrinkling or denting inward under the pressure of gravel or water flow, and ensures that the protective shape is regular and the sealing effect is stable.

[0037] When the support member 11 is squeezed by external force, it can deform and shrink its outer diameter. When the multi-lobed vibrating head 5 retracts and shrinks its diameter and is pulled out, the folded hinge assembly 4 squeezes the flexible protective layer 6. The semi-circular support member 11 can adapt to external force, shrink its outer diameter, and shrink and make way in sync with the vibration structure. There will be no hard support or jamming of the shrinkage stroke, ensuring smooth overall retraction and low head pulling resistance.

[0038] An opening is provided at the lower end of the flexible protective layer 6, allowing the flap-type vibrating element 9 to protrude, and it can also be used to achieve an overall seal.

[0039] The lower end of the flexible protective layer 6 has an opening that matches the contour of the lobe-type vibrator 9. The lobe-type vibrator 9 is always inserted and fitted inside the opening, and is not temporarily protruded or retracted from the opening. The inner wall of the opening is always tightly fitted to the outer surface of each lobe-type vibrator 9. Regardless of whether the multi-lobe vibrating head 5 is in the open working state or the retracted diameter state, the edge of the opening is continuously fitted to the outer wall of the lobe, forming a dynamic sealing structure that follows the movement throughout the process. This can always prevent external water, mud, sand, and fine gravel from entering the folded hinge assembly 4, sliding fit gap, and spring structure inside, thus avoiding the problem of mechanism jamming and action failure caused by sand and gravel intrusion from the root.

[0040] The folding hinge assembly 4 includes a positioning ring 12, which is circumferentially hinged with several second connectors 13. The lower end of the second connectors 13 is correspondingly hinged to the upper end of the first connectors 10. The folding hinge assembly 4 is mainly used to realize the adaptive opening and closing of the multi-lobed vibrating head 5.

[0041] The first connector 10 and the second connector 13 constitute a foldable V-shaped hinge structure.

[0042] When the equipment is operating normally and the packing inside the sleeve 3 squeezes the multi-lobed vibrating head 5, the V-shaped angle is passively opened. With the support and pre-tightening force of the spring, the lobe vibrating element 9 unfolds outward, expanding the vibration compaction diameter. When the vibratory compactor body is lifted upward, the inner wall of the sleeve 3 presses down and squeezes the V-shaped hinge structure, causing the V-shaped angle to narrow and fold, increasing the overall height and reducing the radial width, thereby driving the entire multi-lobed vibrating head 5 to uniformly shrink in diameter.

[0043] The sandbag seal 7 includes a fabric sandbag and sand filling inside the fabric sandbag. It is formed by its own weight and has a flexible ring-shaped sealing structure that is adapted to the shape of the lower opening of the sleeve 3. Under normal conditions, the sandbag seal 7 is pressed and limited by the lower end of the upper flexible protective layer 6, stably sealing the bottom opening of the sleeve 3, preventing external water and silt from entering the interior of the sleeve 3, ensuring that a clean and stable independent filling space is formed inside the sleeve 3, and avoiding the problem of external water flow washing away gravel and causing the filling to disperse and be lost.

[0044] During construction, the vibratory compactor body 1 is pre-assembled inside the double-layer concentric sleeve 3, so that the sleeve 3 and the vibratory compactor body 1 are coaxially fitted into a single structure.

[0045] After the equipment is assembled, the spring between the central drive rod 2 and the multi-lobed vibrating head 5 remains in a pre-tight state. With the expansion effect of the V-shaped folding hinge assembly 4, the multi-lobed vibrating head 5 automatically maintains an outwardly extended working posture. The outer side of the extended lobe vibrating element 9 always fits against the lower opening of the flexible protective layer 6. The sandbag sealing element 7 is inserted from the lower opening of the sleeve 3, forming a stable dynamic sealing structure.

[0046] Subsequently, the prefabricated and assembled sleeve 3 and vibratory compactor body 1 are simultaneously lowered to the underwater pile position. The sandbag seal 7 is composed of a fabric sandbag and internal sand filling material, which is formed by its own weight. After assembly, it fits and seals the lower opening of the sleeve 3, and is pressed and limited by the upper end of the flexible protective layer 6 in the unfolded state, so as to achieve overall sealing of the bottom of the sleeve 3. At the same time, in the operation state, the lower end of the flexible protective layer 6 abuts and supports the underwater mud surface, which can form a stable vertical support reaction force, effectively offsetting the internal top support pressure generated by the accumulation of crushed stone filling material inside the sleeve 3, and avoiding the situation where the bottom seal is opened due to excessive filling pressure, resulting in material leakage and pressure relief failure.

[0047] This assembly and water-launching method ensures that the inside of the sleeve 3 remains clean during the lowering process, preventing water and silt from flowing back into the sleeve 3 cavity. This fundamentally solves the dual problems of traditional external feeding water flow eroding the stone and packing material, as well as the narrow and easily blocked material in the traditional central feeding channel. It provides a reliable sealed working environment for subsequent filling and adaptive vibration operations in the sealed cavity.

[0048] Start the vibratory compactor body 1. The central drive rod 2 drives the multi-lobe vibratory head 5 to vibrate at high frequency and feed downward to carry out underwater soil vibratory compaction hole making operation. The double-layer sleeve 3 moves downward synchronously, continuously providing lateral support against the bottom soil, restraining the soil of the hole wall, preventing the hole wall from collapsing and silt from flowing into the operation area during the hole making stage, and ensuring that the hole outline is regular.

[0049] At this time, the spring between the central drive rod 2 and the multi-lobed vibrating head 5 remains in a pre-tightened state, keeping the multi-lobed vibrating head 5 in an open posture. The V-shaped hinge structure formed by the first connecting member 10 and the second connecting member 13 is in an open state, ensuring the overall outer diameter of the multi-lobed vibrating head 5 is stable and the hole diameter is uniform. At the same time, the flexible protective layer 6 is kept in shape by the internal semi-circular support member 11, and fits the outer wall of the lobe vibrating member 9 throughout the process, forming a dynamic seal to prevent mud and sand from entering the hinge and sliding gaps and prevent the mechanism from jamming.

[0050] After drilling is completed, crushed stone filler is directly poured into the sleeve 3. The filler accumulates within the sealed cavity of the sleeve 3, unaffected by water flow. As the crushed stone filler continues to accumulate, it laterally compresses the petal vibrating element 9 of the multi-petal vibrating head 5. The petal vibrating element 9, through the first connecting piece 10 and the V-shaped hinge structure, further adaptively expands, increasing the outer diameter of the vibrating head in real time. The more filler and the greater the opening amplitude, the more automatically it matches the compaction requirements of different pile diameters, achieving full vibration and compaction of the soil throughout the entire area, improving the density and uniformity of the pile.

[0051] After the pile filler is compacted, the vibratory compactor body 1 is lifted upwards as a whole. At this time, the sleeve 3 remains fixed, and the inner wall of the sleeve 3 exerts a radial compression effect on the outer structure, forcing the V-shaped hinge structure to fold and narrow, causing the petal-shaped vibrating element 9 to retract inwards and reduce its diameter. At the same time, the semi-circular ring-shaped support 11 is compressed and undergoes elastic deformation, reducing its outer diameter. The flexible protective layer 6 contracts synchronously with the vibrating head to make room. The multi-petal vibrating head 5 slides upwards along the central drive rod 2 and compresses the spring, completing the overall retraction and significantly reducing the outer diameter of the equipment, providing structural conditions for smooth extraction.

[0052] As the flap vibrating element 9 retracts and moves upward, the flexible protective layer 6 moves upward simultaneously, completely releasing the pressure and limiting effect on the bottom sandbag seal 7. With no constraint, the sandbag seal 7 automatically falls off due to its own weight, fully opening the lower end of the sleeve 3. The qualified crushed stone filler accumulated inside the sleeve 3 falls into the forming hole in one go, completing the automatic material discharge. This achieves the linkage effect of lifting the equipment and simultaneously unlocking and unloading the material.

[0053] After the material is unloaded, the vibratory compactor body 1 continues to be lifted upwards. The outer diameter of the multi-lobed vibratory head 5, after being narrowed, decreases, allowing it to smoothly move upwards from inside the sleeve 3. The lifting process is less likely to scrape or disturb the crushed stone filling material. The double-layer concentric sleeve 3 remains in place, with the bottom of the inner layer of sleeve 3 being higher than the bottom of the outer layer, forming a stepped structure. When the sleeve 3 is subsequently pulled out, it moves upwards slowly, and the crushed stone inside the sleeve 3 continues to fill the pile hole downwards. Guided by the stepped structure of the double-layer sleeve 3, the crushed stone at the edges slides and gathers towards the center, promoting uniform filling and compaction of the stone material. This effectively reduces the problem of insufficient material and uneven distribution at the edge of the pile body, ultimately forming a continuous and dense crushed stone pile. After the sleeve 3 is completely pulled out, the construction of a single underwater crushed stone pile is completed.

[0054] A construction method for underwater crushed stone pile construction equipment is also provided, including the following steps: S1. Lower the sleeve 3 to support it on the underwater mud surface, place the sandbag seal 7 at the lower opening of the sleeve 3, and lower the assembled vibratory compactor body 1 into the sleeve 3 so that the flexible protective layer 6 and the sandbag seal 7 come into contact and seal.

[0055] S2. Start the vibratory compactor body 1 and feed downwards to complete the soil hole making.

[0056] S3. Add crushed stone filler into the sleeve 3. The crushed stone squeezes the multi-lobed vibrating head 5 to open adaptively and vibrate to compact the pile filler.

[0057] S4. Lift the vibratory compactor body 1 upwards, the sleeve 3 squeezes and folds the hinge assembly 4, the multi-lobed vibrating head 5 shrinks in diameter, and at the same time releases the limiting position on the sandbag seal 7. The sandbag seal 7 falls off, and the gravel falls into the hole to complete the filling.

[0058] S5. Continuously lift the vibratory compactor body 1, remove the vibratory compactor body 1, and finally pull out the sleeve 3 to complete the construction of a single crushed stone pile.

[0059] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An apparatus for underwater crushed stone pile construction, comprising an axially liftable vibratory compactor body (1), wherein the vibratory compactor body (1) includes a central drive rod (2), characterized in that: The vibratory shock body (1) also includes a sleeve (3) coaxially sleeved on the outside of the central drive rod (2). The sleeve (3) is a sandwich-type double-layer concentric structure with inner and outer cylinder walls arranged concentrically and integrally formed, and the lower end is open. The bottom of the inner layer of the sleeve (3) is higher than the bottom of the outer layer, forming a stepped structure. The lower end of the central drive rod (2) is hinged to the multi-lobed vibrating head (5) through the folding hinge assembly (4), and the two are covered with a flexible protective layer (6). The lower end opening of the sleeve (3) is provided with a sandbag seal (7); In the initial state, the folding hinge assembly (4) supports the flexible protective layer (6) and keeps it in an open state. The flexible protective layer (6) supports the sandbag seal (7) and works with the weight of the sandbag seal (7) to form a sealed contact. When the folding hinge assembly (4) is pressed against the sleeve (3), the flexible protective layer (6) retracts inward with the folding hinge assembly (4), causing the flexible protective layer (6) and the sandbag seal (7) to disengage.

2. The construction equipment for underwater crushed stone pile construction according to claim 1, characterized in that: When the sleeve (3) is filled with crushed stone filler, the filler squeezes the multi-lobed vibrating head (5) to open adaptively, expanding the vibration compaction range.

3. The construction equipment for underwater crushed stone pile construction according to claim 1, characterized in that: The multi-lobed vibrating head (5) includes a central vibrating element (8) and several lobe vibrating elements (9). The central vibrating element (8) and the petal vibrating element (9) are hinged together by a first connecting member (10), and the petal vibrating element (9) can slide along the surface of the first connecting member (10).

4. The construction equipment for underwater crushed stone pile construction according to claim 1, characterized in that: The multi-lobed vibrating head (5) is slidably mounted inside the central drive rod (2), and a spring is provided between the central drive rod (2) and the multi-lobed vibrating head (5).

5. The construction equipment for underwater crushed stone pile construction according to claim 1, characterized in that: The flexible protective layer (6) is provided with several support members (11). The support members (11) are normally semi-circular to support the formation of the flexible protective layer (6). When the support members (11) are squeezed by external force, they can deform and shrink their outer diameter.

6. The construction equipment for underwater crushed stone pile construction according to claim 3, characterized in that: The flexible protective layer (6) has an opening at its lower end, through which the flap-type vibrating element (9) protrudes and can cooperate to achieve overall sealing.

7. The construction equipment for underwater crushed stone pile construction according to claim 3, characterized in that: The folding hinge assembly (4) includes a positioning ring (12), which is circumferentially hinged with a plurality of second connectors (13), the lower end of the second connectors (13) being correspondingly hinged to the upper end of the first connectors (10).

8. The construction equipment for underwater crushed stone pile construction according to claim 7, characterized in that: The first connector (10) and the second connector (13) form a foldable V-shaped hinge structure.

9. The construction equipment for underwater crushed stone pile construction according to claim 1, characterized in that: The sandbag seal (7) includes a fabric sandbag and sand filling material inside the fabric sandbag, which is formed by its own weight.

10. A construction method using the underwater crushed stone pile construction equipment according to any one of claims 1 to 9, characterized in that, Includes the following steps: S1. Lower the sleeve (3) to support it on the underwater mud surface, place the sandbag seal (7) at the lower opening of the sleeve (3), and lower the assembled vibratory impactor body (1) into the sleeve (3) so that the flexible protective layer (6) and the sandbag seal (7) come into contact and seal. S2. Start the vibratory compactor body (1) and feed downwards to complete the soil hole making; S3. Add crushed stone filler into the sleeve (3), and the crushed stone squeezes the multi-lobed vibrating head (5) to open adaptively and vibrate to compact the pile filler. S4. Lift the vibratory impactor body (1) upwards, the sleeve (3) squeezes and folds the hinge assembly (4), the multi-lobed vibrating head (5) shrinks in diameter, and at the same time releases the limit on the sandbag seal (7), the sandbag seal (7) falls off, and the gravel falls into the hole to complete the filling. S5. Continuously lift the vibratory compactor body (1), remove the vibratory compactor body (1), and finally pull out the sleeve (3) to complete the construction of a single crushed stone pile.

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